#include <iostream>
#include <cstring>

using namespace std;

void strcat(char * a, char * b)
{
	int l1, l2;
	l1 = strlen(a);
	l2 = strlen(b);
	for(int i = 0; i <= l2; i ++)
	{
		a[l1 + i] = b[i];
	}
}

int main(void)
{
	char a[40] = "ownfo";
	char b[40] = "fowfoizvcx";
	strcat(a, b);
		
	cout << a << endl;

	return 0;
}
